Surface gravity of different planets has a unique surface gravity.
Newton's second law of motion: $F=ma$............(1)
Law of universal gravitation: $F _g=\dfrac{GM _1M _2}{R^2}$............(2)
The value of $G$ was originally determined experimentally by Henry Cavendish and has a value of $6.67\times10^{11} N m^3/kgs^{2}$
By using these two equations, one can derive another equation that shows the acceleration due to gravity at the surface of a planet, i.e., $g=\dfrac{GM}{R^2}$
Where $M$ is the mass of the planet and $R$ is its radius.
The surface gravity of the planets, as determined by the equation above and shown relative to Earth's gravity can be seen below:
Object: g/g-earth: Acceleration at the surface
Earth...............$1.0$...............$g = 9.78\ m/s^2$ ($32.1\ ft/s^2$)
Jupiter.............$2.36$...........$g = 23.1\ m/s^2$ ($75.9\ ft/s^2$)
Saturn.............$1.07$.............$g = 9.05\ m/s^2$($29.4\ ft/s^2$)
Uranus............$0.889$...........$g = 8.69\ m/s^2$($28.5\ ft/s^2$)
Neptune..........$1.12$.............$g = 11.0\ m/s^2$($36.0\ ft/s^2$)
So, surface gravity of different planets in correct decreasing order is Jupiter, Neptune, Saturn, Earth.